This unit is very well belt and almost air tight but the drawers sometimes don't close all the way leaving the last half inch open and you have to kind of twist them both ways and lift them up and down to get them to close completely also the lock unit that is located inside each drawer extends out and pressed on the middle of the DVD or CD unless you put a foam insert on each side of the lock unit to keep the CD or DVD from contacting it. other than that its a very good dust free case solid case.